Rock Hoppers Brew Club RHBC Logs 2008-2017 > Logs > Doctor Cronic’s Black Cat [Schwarzbier]

Schwarzbier – All Grain GONE

Batch #:

2012-05

Batch Size:

10 gallons

Boil Time:

70 min

Conditioning:

Keg

Brew Date:

April 20, 2012

Tap Date:

May 17, 2012

Statistics

Target OG:

1.052 12.9° P

OG:

1.050 12.4° P

Target FG:

1.014 3.6° P

FG:

1.011 2.8° P

Real Extract:

4.5° P

Attenuation:

77.4% Apparent – 63.7% Real

Color:

999 SRM

IBU:

19 Tinseth

BU/GU:

0.38

ABV:

5.2%

ABW:

4.1%

Calories:

165 12 oz

General Info

The Carafa III is cold-steeped in 3L water overnight, filtered, and added to the boil early on.

Malts and Grains

Amount	Malt/Grain	% of Grist
10.00 pounds	German Pilsen Malt (2-Row)	44.9%
7.00 pounds	German Vienna Malt	31.5%
3.00 pounds	German Dark Munich Malt	13.5%
1.00 pounds	Crystal Malt 40L	4.5%
0.50 pounds	German Carafa II	2.2%
0.75 pounds	German Carafa III	3.4%
22.25 pounds	Total Grain Weight	100%

Non-Fermentables

Amount	Non-Fermentable	Time
0.25 tsp	Super-Moss	11 minutes

Hops

Amount	Hop	Time	Type	Use	Form	AA
1.50 ounces	Spalt Select	60 min	Bittering	Boil	Pellets	5.6%
2.00 ounces	Spalt Select	30 min	Bittering	Boil	Pellets	5.6%
3.50 ounces	Total Hop Weight

Yeasts

Name	Lab/Manufacturer	Product ID	Amount
German Lager	White Labs	WLP830	500 ml

Mash Profile Single Decoction

Ideal Grain Temp:

72°F

Ideal Tun Temp:

72°F

Ideal Sparge Temp:

168°F

Ideal PH:

5.4

Notes:

Draw a part of the mash, let it rest for at least 10 minutes, and boil.

Mash Steps

#	Name	Type	Time	Temp.	Description
1	Protein Rest	Infusion	35 min.	122°F	Add water at 126 F
2	Saccharification	Decoction	45 min.	155°F	Decoct 44% of mash, rest for at least 10 minutes, and boil
3	Mash Out	Infusion	10 min.	168°F	Heat to 168° F / 75° C for at least 10 minutes

Water Profile Highlands Ranch, Colorado

Calcium:

31.4 ppm

Bicarbonate:

56.9 ppm

Sulfate:

41.1 ppm

Chloride:

0.9 ppm

Sodium:

27.0 ppm

Magnesium:

3.5 ppm

PH:

5.4

Notes:

Filtered through standard charcoal system.

Procedure

1 lb Carafa III cold steeped, then added to boil

Fermentation and Aging

Primary:

14 days @ 48° F

Secondary:

18 days @ 60° F

Doctor Cronic’s Black Cat

Date Brewed:
Brewer/Assistant:

Brew Day Data

	Target	Actual	Notes
Strike Water Amount:	7.4
Strike Water Temperature:
Mash Temperature(s):
Mash Time:
Sparge Water Amount:	8.3
Sparge Water Temperature:
Pre-Boil Gravity:
Pre-Boil Amount:	11
Post-Boil Amount:	10
Boil Time:	70
OG:	1.050 / 12.4° P
Mash PH:
Boil PH:

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Log: Doctor Cronic’s Black Cat